the ski tech has a chart from the binding manufactur that takes into account height, weight, skill level, age and boot sole length. if your worried about the shop setting just ask them what it will be when you fill out the paperwork. the settings tend to be for casual skiers so they are generally too low for aggressive skiers. check 3+ for your skill level. if thats still too low ask the tech how to change the din yourself (generally, the tech has to follow the chart for insurance reasons). then when you get the skis back you can just crank'em up.